package com.atguigu.day14.read;

/**
 * @author fenge
 */
public class Read05 {
    public static void main(String[] args) {
        StringBuffer a = new StringBuffer("A");
        StringBuffer b = new StringBuffer("B");
        operate(a,b);
        System.out.println(a+","+b);
    }
    static void operate(StringBuffer x,StringBuffer y){
        x.append(y);
        y=x;
    }
}
